// @(#)DeferTimer.java   7/2003
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package drcl.inet.mac;

import java.math.*; 
import drcl.inet.*;
import drcl.net.*;
import drcl.comp.*;

/**
 * The class implements some functions of DeferTimer of IEEE 802.11 protocol.
 * This class is ported from ns-2.1b7a.
 *
 * @see Mac_802_11
 * @see Mac_802_11_Timer
 * @author Ye Ge
 */
class DeferTimer extends Mac_802_11_Timer {

    /**
     * Contructor.
     */
  public DeferTimer(Mac_802_11 h, double s) {
    super(h, s);
    o_.setType(MacTimeoutEvt.Defer_timeout); 
  }  

    /**
     * Contructor.
     */
  public DeferTimer(Mac_802_11 h) {
    super(h, 0);
    o_.setType(MacTimeoutEvt.Defer_timeout); 
  }  

    /**
     * Handles the timeout event. This method is called in Mac_802_11 class.
     */
  public void handle( ) {       
    busy_ = false;
    paused_ = false;
    stime = 0.0;
    rtime = 0.0;
    }

    /**
     * Starts the timer.
     */
    public void start(double time) {
        _assert("DeferTimer start()", "busy_ == false", (busy_ == false));
       busy_ = true;
    paused_ = false;
    stime = host_.getTime();
    rtime = time;

        _assert("DeferTimer start()", "rtime >= 0.0", (rtime >= 0.0));
    host_.setTimeout(o_, rtime);
  }
}

